diff --git a/boards/arm/rk3506/luckfox-lyra-amp/configs/nsh/defconfig b/boards/arm/rk3506/luckfox-lyra-amp/configs/nsh/defconfig
index 7466f256c6e..369f9792ad5 100644
--- a/boards/arm/rk3506/luckfox-lyra-amp/configs/nsh/defconfig
+++ b/boards/arm/rk3506/luckfox-lyra-amp/configs/nsh/defconfig
@@ -46,7 +46,7 @@ CONFIG_LIBM=y
 CONFIG_NSH_BUILTIN_APPS=y
 CONFIG_NSH_FILEIOSIZE=512
 CONFIG_NSH_READLINE=y
-CONFIG_RAM_SIZE=15728640
+CONFIG_RAM_SIZE=33554432
 CONFIG_RAM_START=0x03f00000
 CONFIG_RAM_VSTART=0x03f00000
 CONFIG_RAW_BINARY=y